45823721 has 8 divisors (see below), whose sum is σ = 48802824. Its totient is φ = 42876160.

The previous prime is 45823711. The next prime is 45823727. The reversal of 45823721 is 12732854.

It can be written as a sum of positive squares in 4 ways, for example, as 18156121 + 27667600 = 4261^2 + 5260^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45823721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45823727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4850 + ... + 10731.

It is an arithmetic number, because the mean of its divisors is an integer number (6100353).

Almost surely, 2^45823721 is an apocalyptic number.

It is an amenable number.

45823721 is a deficient number, since it is larger than the sum of its proper divisors (2979103).

45823721 is a wasteful number, since it uses less digits than its factorization.

45823721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15771.

The product of its digits is 13440, while the sum is 32.

The square root of 45823721 is about 6769.3220487727. The cubic root of 45823721 is about 357.8465083812.

The spelling of 45823721 in words is "forty-five million, eight hundred twenty-three thousand, seven hundred twenty-one".